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Manufacturing process of cellulose whiskers/polylactic acid nanocomposites
Norwegian University of Science and Technology (NTNU), Trondheim.ORCID iD: 0000-0001-8909-3554
2006 (English)In: Composites Science And Technology, ISSN 0266-3538, E-ISSN 1879-1050, Vol. 66, no 15, p. 2776-2784Article in journal (Refereed) Published
Abstract [en]

Cellulose whiskers separated from commercially available microcrystalline cellulose (MCC) and polylactic acid (PLA) were used to develop novel nanostructured biocomposites by compounding extrusion. MCC was treated with N,N-dimethylacetamide (DMAc) containing lithium chloride (LiCl) in order to swell the MCC and partly separate the cellulose whiskers. The suspension of whiskers was pumped into the polymer melt during the extrusion process. Different microscopy techniques, thermogravimetric analysis, X-ray diffraction and mechanical testing were used to study the structure and properties of the whiskers and composites. The results showed that DMAc/LiCl can be used as swelling/separation agent for MCC but seems to cause degradation of the composites at high temperature processing. The structure of composites was made up of partly separated nanowhiskers when PEG was used as processing aid. The mechanical properties of nanocomposites were improved and compared to reference material the elongation to break was increased about 800% for one material combination. The future studies will be focused on process optimization, dispersion of nanowhiskers and finding a more suitable pumping medium to avoid thermal degradation of the composite.

Place, publisher, year, edition, pages
2006. Vol. 66, no 15, p. 2776-2784
National Category
Bio Materials
Research subject
Wood and Bionanocomposites
Identifiers
URN: urn:nbn:se:ltu:diva-8496DOI: 10.1016/j.compscitech.2006.03.002Local ID: 702c0bc0-0eb0-11dc-b9dd-000ea68e967bOAI: oai:DiVA.org:ltu-8496DiVA, id: diva2:981434
Note
Upprättat; 2006; 20070530 (krioks)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Oksman, KristiinaMathew, Aji P.

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